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Jam-27,1931. e. B. NICHOLS TUBE END BUFFER Filed Dc. 2. 1927 L INVENTQR. GEORGE E. A /c/ ozs. 7 BY 6% M I I ATTORNEYJ.

Patented Jan. 27, 1931v UNITED STATES mane PATENT art-ice enonen B. NICHOLS, or AKRON, OHIO, Assrenon 'ro THE FIRESTONE Tran AND RUBBER COMPANY, or AKRON, OHIO, A CORPORATION or OHIO 1 TUBE-END BUFFER Application filed December 2, 1927. Serial No. 237,200.

This invention relates to devices for buffing or abrading devices for roughening'the skived ends of rubber tubes to be spliced by cementing or vulcanizing the same together.

An object of the device is to provide means for rotatably supporting a mandrel on which the end of a tube to be buffed is positioned and for aligning said mandrel with respect to a bufiing or abrading wheel. A further object is to devise means for aligning the mandrel for buffing either the external or the internal surface of a skived tube end.

The foregoing and other objects are obtained by the device illustrated in the accompanying drawings and described below. It is to be understood that the invent-ion is not limited to the specific form thereof disclosed herein.

Of the accompanying drawings,

Figure 1 is a side elevation of a device embodying the principles of the invention;

Figure 2 is a plan view thereof illustrating the mandrel supporting means in one posi tion;

Figure 3 is a similar view, partly broken away, illustrating said means in another position; and

Figure 4 is a detail section of the tube mandrel.

Referring to the drawings, 10 is a base or table supported by a pedestal 11. A motor 12 is mounted on the table and serves to rotate a bufiing or abrading wheel 13 carried on the end of its shaft 14 journaled in standard 15. Bracket 16 is hingedly mounted with respect to table 10 by means of a verticalstud shaft 17 adjustably clamped in slot 18 in said table, said bracket having an arm or stud shaft 19 hinged thereto. A lug 20 on arm 19 projects within the end of bracket 16 and abuts either of adjusting screws 21 or 21 to permit a limited horizontal swinging movement, whereby a reciprocable mandrel 22 slidably journaled on the arni, (Figure 4), may be swung into either of two inclined positions with respect to the buffing wheel. Various sizes of mandrels may be provided for accommodating different sized tubes 28 to be bulfed,those mandrels not in use being conveniently retained in suitable apertures 24 in table 10.

In operation, the externally bevelled or skived end 25 of tube 23 is placed over mandrel 22 and brought into bufling position by swinging arm 16 until the tube engages the b n-fling wheel 13. In order to align the bev- .elled tube end 25 with the wheel, arm 19 is inclined relatively away from the wheel with lug 20' abuttlng screw 21, a-s'illustrated in F gure 2. The mandrel is then rotated by hand and also reciprocated slightly to bring is placed on the mandrel. Since the bevel on this end tapers in an opposite direction from the external bevel, tube end26 is aligned with the bufling wheel by swinging arm 19 relatively toward'the wheel until lug 20 abuts screw 21 as illustrated in Figure 3.

Modifications of the structure herein disclosed may be resorted to without departing from the spirit of the invention or the scope thereof as defined by the appended claims.

What is claimed is:

1. A tube end abrading device comprising a rotatable abrading wheel, an arm pivoted with respect to said wheel, a mandrel rotatably and slidably mounted on the free end of said arm for carrying a tube end posie tioned on said mandrel into engagement with said wheel, a hinge joint in said arm permitting the mandrel to be inclined either toward or away from said wheel, and adjustable means for limiting the inclination of the mandrel to alignceither of oppositely bevelled ends on said tube with said wheel.

2. A device for abrading internally or externally bevelled tube ends, said device com prising a rotatable buffing wheel, a mandrel for carrying a tube end into engagement with said wheel, means pivoted with respect to said wheel for inclining said mandrel either toward or away from said wheel to align either an externally bevelled tube end limiting the movement of said pivoted means 2 toward the wheel to determine the beveling angle for an internal bevel, and stop means for limiting the movement of said pivoted means away from the Wheel to determine the beveling angle for an exterior bevel.

8. A device of the character described comp 'ising a bufling or abrading Wheel, means for rotatably carrying an article to be bufi'ed into engagement With said Wheel, and means including an arm pivoted to swing toward and from said Wheel and a shaft hinged to said arm to swing toward and from said Wheel for aligning said carrying means in either of oppositely inclined positions with respect to said Wheel, whereby either of oppositely bevelled surfaces of the article may be bufied.

4-. A device for bufiing tube ends, said device comprising a rotatable bufiing Wheel, an arm pivoted with respect to said Wheel and a mandrel slidably j ournaled on the free end of said arm for carrying a tube end position-ed on said mandrel into engagement With said bufling Wheel.

GEORGE E. NICHOLS. 

